Adjustable reversible micrometer caliper



Oct.19,1926.- 1,603,663

- L. A. COOPER ADJUSTABLE REVERSIBLE MICROMETER CALIPER Filed May 15, 1926 INVENTOR.

'- Lame/2A. 0190 06! Patented Oct. 19, 1926. 1

UNITED ST EES LUCiEN A. ooorna, or DENVER, conortano.

ADJUSTABLE REVERSIBLE MIGROMETER GALIPER.

Application filed May 13, 1926. Serial No. 108,925.

This invention relates to combined calipers and micrometers and particularly to the provision of a mounting for the micrometer whereby the two elements of a micrometer may be coarsely adjusted nearer to or farther from each other to thus permit the micrometers to be used for a relatively large range of work.

The general object of the invention is to provide an extension bar or equivalent member having posts which are adjustable along the bar into a plurality of different spaced relations to each other, these posts being provided with means whereby the two members of a micrometer may be mounted thereon in confronting relation, and a further object is to so form the posts that the two members of the micrometer may be adjusted longitudinally with relation to each other in the usual manner or may be reversed to thereby permit the combined caliper and micrometer to be used either for outside or inside measurements.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings wherein Figure 1 is a side elevation of my improved micrometer and caliper in its work ing position;

Fig. 2 is a section on the line 2*2 of Figure 1;

Fig. 3 is a section on the line 3-3 of Figure 1;

Fig. 4: is a fragmentary elevation of one end of the caliper and micrometer mounting showing the abutment screw reversed.

Referring to the drawings designates an extension bar of any suitable character and having its end portions formed with two downwardly tapering sockets 11, each pair of sockets being joined by a longitudinally extending slot 12. Extending trans versely through the ends of the extension bar 10 is the adjusting screw 13 which intersects the slot 12 and by turning up on this screw, the slot 12 may be contracted to thus contract the socket 11 upon the post supporting the micrometer elements. While I have illustrated a bar 10 having two tapering sockets 11, I wish it understood that the bar might be formed with more sockets if necessary and be of greater length.

Engageable with the sockets 11 are the lmver tapering ends 14% of posts 15. These posts are illustrated as reetangniar in tion and the tapering ends 14 of the posts may be circular in cross section or have any other desired form. The upper end of each post is formed with a longitudinally extending aperture 16 intersected by a vertical slot 17 terminating preferably in an enlarged opening 18, and a clamp screw 19 longitudinally extending adjustable terminal 21. Mounted in the other 'post 15'is a screw-threaded terminal element 22 which has screw-threaded engagement with the upper end of the post 15 and is held in its adjusted position by means of a set nut 23.

Generally speaking, the micrometer 20 is adjustable through the length of one inch and a like adjustment may be made of the element 22. To get further adjustment of the calipers another inch can be secured by reversing the extension screw 22 with the nut 2& on the inside, that is, confronting the member 21. Two inches more can be secured by placing the posts 15 in the two outer sockets 11 and thus four inches of adjustment may be secured. While I have shown the extension bar 10 with four adjustment sockets or holes 11, I do not wish to be limited to any specific number of sockets as a greater number of sockets may be used than four, and while I have illustrated my device as being used as an outside caliper for taking measurements of round or square shafts and the like, these calipers can also be used for inside measurements by simply reversing the caliper elements 20 and 22, end for end. Thus, the caliper may be used for measuring hollow cylinders or taking measurements between two points of an object.

The micrometer 20 and the extension screw 22 may be of any suitable construction. My invention will lie entirely in the combination of the caliper elements 20 and 22 with an extension bar having posts so connected to the bar that they may be shifted, the posts having means whereby they may be clamped upon. and support the caliper elements .20 and 22. While 1 have illustrated the tension and the pests as being square in cross section, I do not wish to be limited to this as they may have any cross sectional form which will function properly. I have shown a micrometer having a one inchad justment on the screw proper of the micrometer but I may alsous'e a micrometer having any desired screw adjustment within the limits of the caliper and for the class 01' work desired.

It will be obvious that this combined caliper and micrometer may be very readily adjustedto carry the micrometer elements toward or from each other and that the posts may be readily and quickly shifted to suit any'class of work desired.

I claim 1. A micrometer caliper comprising a supportingzbar'havinga plurality of sockets in each end,"a pair ofposts each having an end adapted to fit in any one of said sockets, the' posts extending at right angles to the bar, means for clamping the posts in the sockets,'coacting caliper elements, and means at the ends of the post remote from the bar adapted to clamp saidcaliper elements in opposed relation.

2. A micrometer caliper of the character described including a supporting bar having a plurality of tapering sockets at each end, posts each having one end tapered and adapted to fit within any one of said tapering sockets, means for clamping said posts in the sockets, a pair of'caliper elements, the other end of each post having a transversely extending aperture adapted to receive a portion of a caliper element, and means for clamping the caliper elements within said apertures.

3. A micrometer caliper comprising an extension bar having a plurality of sockets at each end, a pair of posts each having its inner end formed to engage in any one of said sockets and being thereby adjustable alongsaid bar, means forclamping the posts rigidly in place Within the sockets, a screw micrometer reversibly mounted in one of said posts, a'caliper element having screwthreaded adjustment in the other post and reversible therein, and means for holding the last named element against accidental movement' after adjustment.

In testimony whereof I hereunto affix my signature.

LUCIEN A. COOPER. 

